On October 22, 2021, the badminton Danish Open quarterfinals were born, the men's doubles were unpopular, Gideon/Sukamuyo, Ashan/Hendra, Li Yang/Wang Qilin, Xie Dingfeng/Su Weiyi, Xie Ti/Ranki Reddy was out, the world's top ten were only Alfram/Adianto, the men's singles player Antonsen lost, the Chinese team women's singles duo, mixed doubles two-pair combination, women's doubles triple pairs all advanced.
Men's singles Lu Guangzu lost 0-2 to Zhou Tiancheng, Shi Yuqi withdrew from the game only he played, in the end it is likely that Acesaron and Momota Ken fought to win the championship, India's Verma 2-0 upset the world's third Antonsen, in the Thomas Cup Wilma once lost to Lu Guangzu, the quarterfinals were released: Momota Kendou vs Jonatan, Zhou Tiancheng vs Lee Zhuoyao, Verma vs Sugiato, Acesaron vs Li Zijia.
Women's singles He Bingjiao once again swept Japan's Takahashi Shayaga 2-0, Wang Zhiyi defeated Thailand's Chaiwan 2-0, the two will determine one person to advance, for He Bingjiao, the promotion to the semifinals should be no problem, the main opponents are Still Sindu and Akane Yamaguchi, the quarterfinals are out: Gilmore vs Kim Jia Eun, Sindu vs Azul Mendi, He Bingjiao vs Wang Zhiyi, Yamaguchi Akane vs Li Wonderful.
The men's doubles seeds are only the Indonesian combination Alfram/Adianto and the Danish combination Astrup/Rasmussen, two Japanese combinations, and the quarter-final matchup: Fikri/Mullana vs Astrup/Rasmussen, Wang Yaoxin/Zhang Yuyu vs Dessel/Ramsforth, Homu Choro/Yugo Kobayashi vs Koga Kei/Taiichi Saito, Alfram/AdiAnto vs Wu Shifei/Izudin.
Wang Chang/Di Zijian and Tan Qiang/He Jiting were both out of the first round, and Zhou Haodong, Li Shifeng and Weng Hongyang did not register for the competition.
The women's doubles triple pair advanced, Zheng Yu / Huang Dongping 2-1 reverse Stooi sisters, Du Yue / Li Wenmei swept the Danish combination of Lavin / Ma Eron 2-0, Liu Xuanxuan / Xia Yuting beat the French combination Alyssa / Van de Al 2-0, the Japanese team of Fukushima Yuki / Higashino Yusa lost 0-2 to Kim Zhaoying / Kong Xirong, and the Japanese women's doubles all missed the quarterfinals.
Quarterfinals: Du Yue/Li Wenmei vs Zong Gongpan/La Wenda, Liu Xuanxuan/Xia Yuting vs Jin Zhaoying/Kong Xirong, Zheng Yu/Huang Dongping vs Polly/Lahayu, Li Shaoxi/Shen Shengzhen vs Putita/Sha Xili.
Mixed doubles Olympic champions Wang Yilu / Huang Dongping swept the French duo of Jiquier / Del Lu 2-0, Feng Yanzhe / Du Yue eliminated the Hong Kong combination of Zhang Dezheng / Wu Yongyao 2-0, and the quarter-finals were released: Wang Yilu / Huang Dongping vs Deng Junwen / Xie Yingxue, Dechabo / Sha Xili vs Li Zhehui / Xu Yaqing, Feng Yanzhe / Du Yue vs Jordan / Meratti, Watanabe Yongda / Higashino Yusha vs Chen Jianming / Lai Peijun.